Should I upgrade from DDR4 to DDR5, or stick with DDR4?

Stick with DDR4 unless you’re building fresh. For gaming and daily use, the performance gain is only 5-10% and not noticeable. Upgrading requires a costly new CPU, motherboard, and RAM. If your current DDR4 system is solid, spend on a better GPU or storage instead. Only get DDR5 if building from scratch for future-proofing.